THE 60 LINES MIRROR SCREWmade by Roger DUPOUY

Characteristics:

On this machine, the 60 lines television images are reproduced by an helicoidal assembly of 60 mirrors,
according to the system of D.B. Gardner, US patented by 1928.
The image size is 9 centimeters high by 12 centimeters width.
Frame frequency: 25 images/sec. Motor speed=1500rpm. synchronized by P.L.L.